Wood Group said it was “hugely disappointed” that the action was progressing “despite the significant movements we had made”.

Dave Stewart, CEO for Wood Group’s eastern region business unit, said: “We were willing to suspend the implementation of the terms and conditions currently proposed to enable further detailed discussions with our employees and the unions.

“We urge the unions to show willingness to reengage with us with a clear objective of reaching a resolution that safeguards employment opportunities for our employees, their members, both now and in the future.

“The safety and wellbeing of our employees remains our top priority and our commitment is to ensuring this is not compromised by this extended period of industrial action.”